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CVE-2024-41066— ibmvnic: Add tx check to prevent skb leak

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于在传输过程中，未检查skb地址是否为null，如果free_map和tx_buff列表不同步，可能导致skb内存泄漏。

CVSS 7.5 · High EPSS 0.53% · P44

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8< 16ad1557cae582e79bb82dddd612d9bdfaa11d4c affected
65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8< 267c61c4afed0ff9a2e83462abad3f41d8ca1f06 affected
65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8< e7b75def33eae61ddaad6cb616c517dc3882eb2a affected
65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8< 0983d288caf984de0202c66641577b739caad561 affected
1a64564eee05128f773930649edfdd50cbe80656 affected
5142c39253385702a4de8f897027e1d76fc333de affected
5.12.17< 5.13 affected
5.13.2< 5.14 affected
… +6 more rows
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I. Basic Information for CVE-2024-41066

Vulnerability Information
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Vulnerability Title
ibmvnic: Add tx check to prevent skb leak
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ibmvnic: Add tx check to prevent skb leak Below is a summary of how the driver stores a reference to an skb during transmit: tx_buff[free_map[consumer_index]]->skb = new_skb; free_map[consumer_index] = IBMVNIC_INVALID_MAP; consumer_index ++; Where variable data looks like this: free_map == [4, IBMVNIC_INVALID_MAP, IBMVNIC_INVALID_MAP, 0, 3] consumer_index^ tx_buff == [skb=null, skb=<ptr>, skb=<ptr>, skb=null, skb=null] The driver has checks to ensure that free_map[consumer_index] pointed to a valid index but there was no check to ensure that this index pointed to an unused/null skb address. So, if, by some chance, our free_map and tx_buff lists become out of sync then we were previously risking an skb memory leak. This could then cause tcp congestion control to stop sending packets, eventually leading to ETIMEDOUT. Therefore, add a conditional to ensure that the skb address is null. If not then warn the user (because this is still a bug that should be patched) and free the old pointer to prevent memleak/tcp problems.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于在传输过程中，未检查skb地址是否为null，如果free_map和tx_buff列表不同步，可能导致skb内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8 ~ 16ad1557cae582e79bb82dddd612d9bdfaa11d4c -
Linux Linux 5.14 -

II. Public POCs for CVE-2024-41066

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III. Intelligence Information for CVE-2024-41066

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Other References for CVE-2024-41066 (3)

Same Patch Batch · Linux · 2024-07-29 · 121 CVEs total

CVE-2024-41040 9.8 CRITICAL net/sched: Fix UAF when resolving a clash
CVE-2024-41073 9.8 CRITICAL nvme: avoid double free special payload
CVE-2024-41081 9.8 CRITICAL ila: block BH in ila_output()
CVE-2024-41091 8.8 HIGH tun: add missing verification for short frame
CVE-2024-41090 8.8 HIGH tap: add missing verification for short frame
CVE-2024-41062 8.8 HIGH bluetooth/l2cap: sync sock recv cb and release
CVE-2024-41046 8.8 HIGH net: ethernet: lantiq_etop: fix double free in detach
CVE-2024-42083 8.8 HIGH ionic: fix kernel panic due to multi-buffer handling
CVE-2024-42064 7.8 HIGH drm/amd/display: Skip pipe if the pipe idx not set properly
CVE-2024-41070 7.8 HIGH KVM: PPC: Book3S HV: Prevent UAF in kvm_spapr_tce_attach_iommu_group()
CVE-2024-41041 7.8 HIGH udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().
CVE-2024-41045 7.8 HIGH bpf: Defer work in bpf_timer_cancel_and_free
CVE-2024-41049 7.8 HIGH filelock: fix potential use-after-free in posix_lock_inode
CVE-2024-42066 7.8 HIGH drm/xe: Fix potential integer overflow in page size calculation
CVE-2024-41051 7.8 HIGH cachefiles: wait for ondemand_object_worker to finish when dropping object
CVE-2024-42067 7.8 HIGH bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()
CVE-2024-42072 7.8 HIGH bpf: Fix may_goto with negative offset.
CVE-2024-42075 7.8 HIGH bpf: Fix remap of arena.
CVE-2024-41064 7.8 HIGH powerpc/eeh: avoid possible crash when edev->pdev changes
CVE-2024-41059 7.8 HIGH hfsplus: fix uninit-value in copy_name

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-41066

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